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package org.apache.james.queue.rabbitmq.view.cassandra.configuration;

import java.util.List;

import org.apache.james.eventsourcing.CommandHandler;
import org.apache.james.eventsourcing.EventWithState;
import org.apache.james.eventsourcing.eventstore.EventStore;
import org.reactivestreams.Publisher;

import reactor.core.publisher.Mono;

class RegisterConfigurationCommandHandler implements CommandHandler<RegisterConfigurationCommand> {

    private final EventStore eventStore;

    RegisterConfigurationCommandHandler(EventStore eventStore) {
        this.eventStore = eventStore;
    }

    @Override
    public Class<RegisterConfigurationCommand> handledClass() {
        return RegisterConfigurationCommand.class;
    }

    @Override
    public Publisher<List<EventWithState>> handle(RegisterConfigurationCommand command) {
        return Mono.from(eventStore.getEventsOfAggregate(command.getAggregateId()))
            .map(history -> ConfigurationAggregate
                .load(command.getAggregateId(), history)
                .registerConfiguration(command.getConfiguration()));
    }
}
